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    <title>HTML 模板 逻辑值表达式条件判定 - 前后端一体 WEB 视图框架示例 - C# 高性能自动化服务端框架 - 凹凸架构</title>
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    <!--If:True-->
    <div>逻辑真值</div>
    <!--If:True-->
    <!--If:!False-->
    <div>长度为 0 的字符串返回 false，前置 ! 表示取反</div>
    <!--If:!False-->
    <!--If:True|False-->
    <div>任意一个逻辑真值输出</div>
    <!--If:True|False-->
    <!--If:!True&False-->
    <div>If:!True&False 等价于 If:True|False</div>
    <!--If:!True&False-->
    <!--If:String=ABC-->
    <div>String == ABC</div>
    <!--If:String=ABC-->
    <!--If:!String=DEF-->
    <div>String != DEF</div>
    <!--If:!String=DEF-->
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